here's my problem.
Suppose, we have one task that calls "MPI_Spawn" twice to spawn two sets
For each set of processes, an inter-communicator will exist in order to
send/receive messages to/from its father. (thanks to MPI_Comm_parent).
Suppose now, that the first set of spawned processes needs to send/receive
messages to/from the other set of spawned processes.
How can I do that ?
I did not see any hints about that in the current version of the "dynamic
process" chatper of MPI-2.
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